I'm trying to find open source local caching package proxy software

[joshbressers@infosec.exchange]

I'm trying to find open source local caching package proxy software

I don't want anything transparent, I want something that's a very deliberate local mirror

The only thing that does more than one ecosystem I can find is

GitHub - git-pkgs/proxy: A caching proxy for package registries.

A caching proxy for package registries. . Contribute to git-pkgs/proxy development by creating an account on GitHub.

GitHub (github.com)

which is from @andrewnez

Does anyone know of anything else?